Warren lyon



UNITED STATES PATENT OFFICE.

WARREN LYON, OF NEW YORK, N. Y.

METAL-DRILL.

Specification of Letters Patent No. 10,035, dated September 20, 1858.

To all whom t may concern:

Be it known that I, WARREN LYON, of the city, county, and State of NewYork, have invented a new and useful Improvement in Drilling andCountersinking Machines; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same, reference being had to the accom panying drawing, making apart of this specification, which drawing is av front elevation of myimproved drilling-machine.

The nature oit my invention consists in having a weight attached to thearbor of the drill, for the purpose of giving the requisite pressure,and in having a system of levers and a counterpoise connected to theupper part of the arbor, for the purpose of ele vating the arbor andgraduating the p ressure which is given the drill by the weight upon thearbor.

The combination of the weight and levers with the counterpoiseconstitutes the invention.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A, represents a standard, to 'which is attached by horizontal arms thebearings, (a), (a), through which a vertical arbor, B, works loosely. Inthe lower end of the arbor, B, is atxed the drill, C, underneath whichis a bedplate, D, on which the work to be drilled is placed. On theupper end of the arbor, B, there is attached a weight, E, which is ofsuicient size to give the requisite pressure to the drill, C, and alsoto serve as a balance wheel, which is advan tageous if the arbor beturned by a crank. To the upper end of the arbor, B, there is attachedby a swivel, F, a small upright, G, to which is secured by a pivot, oneend of a lever, H; said lever, H, having its fulcrum at, (c). Theopposite end of the lever, I-I, is attached by a small connecting rod,I, to a lever, J, having its fulcrum at, (d). The inner end of thelever, J, has a rack bar, K, suspended from it, which rack bar passesthrough a slot, (e), in the end of an arm, L. On the upper surface ofthe lever, J, there is secured a horizontalrod, M, on which acounterpoise, N, slides. This counter-poise may be secured firmly to therod, M, at any desired point, by a Set screw, (f)

Uperation: The article to be drilled is placed upon the bedplate, D, andthe drill, C, bears upon it with suiiicient pressure to give thenecessary feed, owing to the weight, E. The pressure is always regular,(no variation hence the drill is not liable tobe broken as in ordinarydrills where the feed movement is produced by a screw or lever.

Vhen it is necessary to withdraw the drill from the hole, or the work,the rack bar, K, is drawn downward, and the rack is made to catch intothe side of' the recess, (e), by which arrangement the drill is keptsuspended until the work on the bedplate is shifted; the rack bar isthen treed from the side of the recess, (e), and the drill is allowed todescend and rest upon the work.

By properly adjusting the counterpoise, N, on the rod, M, the pressureof the wieght, E, may be made greater or less, as desired; or instance,if the counterpoise be moved toward t-he end, (y), of the rod, M, thepressure of the weight, E, is diminished; and the reverse is the casewhen the counterpoise is moved toward the opposite end, of the rod, M.

The arbor, B, may be turned by a crank, O, by hand, or it may be turnedby other power; two pulleysa loose one and a working one-being put onthe arbor.

The above machine is extremely useful in countersinking, as unequalpressure or an unequal eed motion, in that case, is very liable to breakthe drill.

I do not claim the weight, attached to the arbor, irrespective of thelevers and counterpoise; nor do I claim any of the within named partsseparately; but

Having described my invention, what I claim as new, and desire to secureby Letters-Patent, is,

The combination of the weight, E, levers, H, J, and counterpoise, N,constructed, arranged, and operating, in the manner, and for thepurposes substantially as herein shown and described.

WARREN LYON.

Witnesses ALBERT LYON, L. F. COHEN.

